add template documentation #1

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	### example for Github Container Registry (ghcr.io)
	### example for Docker Hub
	###
	### Your container image name will be:
	### ghcr.io/<github-account>/<repo-name>:latest
	###
	#######################################################
	#######################################################

	#######################################################
	### Uncomment all lines below to use this template ###
	#######################################################

	# name: "Docker build & push - GHCR"
	#
	# concurrency:
	# group: ${{ github.workflow }}-${{ github.event.pull_request.number \|\| github.ref }}
	# cancel-in-progress: true
	#
	# on:
	# pull_request:
	# types: [closed]
	# push:
	# workflow_dispatch:
	#
	# env:
	# REGISTRY: ghcr.io
	# IMAGE_NAME: ${{ github.repository }}:latest
	#
	# jobs:
	# docker-build-push:
	# runs-on: ubuntu-latest
	# permissions:
	# packages: write
	#
	# steps:
	# - name: Checkout repository
	# uses: actions/checkout@v4
	#
	# - name: Set up QEMU
	# uses: docker/setup-qemu-action@v3
	#
	# - name: Set up Docker Buildx
	# uses: docker/setup-buildx-action@v3
	#
	# - name: Log in to the Container registry
	# uses: docker/login-action@v3
	# with:
	# registry: ${{ env.REGISTRY }}
	# username: ${{ github.actor }}
	# password: ${{ secrets.GITHUB_TOKEN }}
	#
	# - name: "Build and push Docker image"
	# uses: docker/build-push-action@v6
	# with:
	# push: true
	# tags: ${{ env.REGISTRY }}/${{env.IMAGE_NAME}}

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